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A standardized exam with 400 multiple-choice questions has choices from a through d. There is only one correct answer. If the answer is correct, you

A standardized exam with 400 multiple-choice questions has choices from a through d. There is only one correct answer. If the answer is correct, you get 8 points, if the answer is incorrect, you lose 2 points, and if the answer is left blank, you get 0 points. Find the expected value if you can eliminate (a) one choice and (b) two choices

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